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2. Technical Information Cont.
ENERGY CAPACITY
Nominal heat input
(0/2000ft)
Nominal heat input
(2000/4500ft)
Minimum heat input
Maximum useful output
(0/2000ft)
Maximum useful output
(2000/4500ft)
Minimum useful output
GAS SUPPLY PRESSURE
Gas
Normal
Natural
inwc
Propane
inwc
GAS PRESSURE AT BURNER
Gas
Natural
inwc
Propane
inwc
FLUE DESIGN
Minimum Venturi pressure
Flue pipe diameter
Coaxial
Twin split pipes
Nominal heat fl ow rate
(0/2000ft)
Nominal heat fl ow rate
(2000/4500ft)
Min Exhaust temperature
Max Exhaust temperature
RIVA PLUS COMBI MANUAL
MBH
116.0
MBH
110.2
MBH
49.5
MBH
102.0
MBH
97.2
MBH
41.6
Min
Max
7.0
3.5
10.5
11.0
8.0
13.0
Min
Max
Ignition
1.0
4.8
2.4
2.0
10.3
5.2
inwc
0.64
2.25/4
in
3.25/5
in
3.25/3.25
MBH
116.0
MBH
110.2
°F
130
°F
195
GAS FLOW RATE
Gas
Natural
ft³/h
Propane
lb/h
CLEARANCE TO COMBUSTIBLES
Front
Back
Top
Sides
Bottom
Flue pipe enclosed
Flue pipe free air
FLUE GAS FIGURES
Gas
CO
2
O
2
DOMESTIC HOT WATER
Maximum temperature
Minimum temperature
Maximum pressure
Minimum pressure
D.h.w. ΔT 25K
D.h.w. ΔT 30 K
D.h.w. ΔT 35 K
D.h.w. ΔT 40 K
Min
Max
48.7
115.1
2.2
5.2
in
18
in
0
in
8
in
2
in
8
in
2
in
0
Min
Max
2.5%
6.3%
16.5%
9.7%
°F
131
°F
95
psi
145
psi
4.35
gal/h
4.5
gal/h
3.8
gal/h
3.2
gal/h
2.8
9
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